function toHSL()

in src/utils.ts [134:158]

• 22 lines of code
• 7 McCabe index (conditional complexity)

function toHSL(rgb) {
    const [r, g, b] = rgb.map(n => n / 255);

    const max = Math.max(r, g, b);
    const min = Math.min(r, g, b);

    let h;
    let s;
    let l = (max + min) / 2;

    if (max === min) {
        h = s = 0; // achromatic
    }
    else {
        const d = max - min;
        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
        switch (max) {
            case r: h = (g - b) / d + (g < b ? 6 : 0); break;
            case g: h = (b - r) / d + 2; break;
            case b: h = (r - g) / d + 4; break;
        }
        h /= 6;
    }
    return [h, s, l];
}